2661542106550 has 24 divisors (see below), whose sum is σ = 4975345062000. Its totient is φ = 1059267005280.

The previous prime is 2661542106467. The next prime is 2661542106569. The reversal of 2661542106550 is 556012451662.

2661542106550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2661542106550² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2661542106497 and 2661542106506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133735885 + ... + 133755784.

It is an arithmetic number, because the mean of its divisors is an integer number (207306044250).

Almost surely, 2^{2661542106550} is an apocalyptic number.

2661542106550 is a deficient number, since it is larger than the sum of its proper divisors (2313802955450).

2661542106550 is a wasteful number, since it uses less digits than its factorization.

2661542106550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267491880 (or 267491875 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 2661542106550 in words is "two trillion, six hundred sixty-one billion, five hundred forty-two million, one hundred six thousand, five hundred fifty".